diff --git a/.changeset/page-block-inspector-curated-label-i18n-3913.md b/.changeset/page-block-inspector-curated-label-i18n-3913.md
new file mode 100644
index 000000000..5ef3d668e
--- /dev/null
+++ b/.changeset/page-block-inspector-curated-label-i18n-3913.md
@@ -0,0 +1,41 @@
+---
+"@object-ui/app-shell": patch
+---
+
+Page block inspector: the PROPERTIES panel's curated field labels now follow the session locale instead of always rendering English
+
+`PageBlockInspector`'s chrome went through the translation table from the start —
+`t('engine.inspector.pageBlock.properties')` and its siblings — while the panel's
+CONTENTS did not. Every `label` in `previews/block-config.ts` was an English
+literal handed straight to the field components, so a zh-CN admin opening any
+page block read 「属性」 over a stack of English field names: two languages in one
+panel, reproducible on any block with no special data.
+
+All 157 label literals (152 field/option labels + 5 `addLabel`s) are now
+translation keys resolved through `t(key, locale)` at render, with 154 distinct
+keys added to both the `en-US` and `zh-CN` sides of
+`views/metadata-admin/i18n.ts`. The English text is unchanged: every key's `en`
+value is the literal it replaced, verified by substituting all 157 keys back and
+diffing the result byte-for-byte against the pre-change file.
+
+The key is a function of the label's POSITION in `BLOCK_CONFIG`
+(`engine.inspector.pageBlock.field.<blockType>.<name>`, `.add.<blockType>.<name>`,
+`.option.<fieldName>.<value>`), and a test re-derives all three shapes from the
+table's own structure. That is what makes the realistic mistake visible: these
+keys differ by one segment, so adding a block by copy-pasting a neighbour's key
+yields a key that EXISTS in both locales and renders a plausible label belonging
+to a different property — an existence-only check is green for it. Positional
+keys also let one English word take different Chinese per block, which the panel
+needs: `element:button.label` is a button caption 「按钮文字」 while
+`page:tabs.items.label` is a tab title 「标签」, and `Add section` is 「添加分区」
+here but stays 「添加分组」 in the form-layout canvas.
+
+`addLabel` is now REQUIRED on the `array` field variant. It was optional and the
+inspector fell back to a bare English `'Add'` — an untranslatable literal no
+locale table could reach. Requiring it deletes the fallback instead of
+translating it, so a new array field cannot compile without naming its
+add-button key.
+
+Option labels are translated too, including the ones `ColorVariantPicker` renders
+only as `aria-label`/`title`, where an untranslated string is invisible to a text
+query.
diff --git a/packages/app-shell/src/views/metadata-admin/i18n.ts b/packages/app-shell/src/views/metadata-admin/i18n.ts
index a35116697..257e0566d 100644
--- a/packages/app-shell/src/views/metadata-admin/i18n.ts
+++ b/packages/app-shell/src/views/metadata-admin/i18n.ts
@@ -478,6 +478,166 @@ const ENGINE_STRINGS_EN: Record<string, string> = {
   'engine.inspector.pageBlock.advanced': 'Advanced',
   'engine.inspector.pageBlock.remove': 'Remove block',
   'engine.inspector.pageBlock.outlineLabel': 'Blocks',
+  // Page block inspector — curated property labels (#3913).
+  // These are the `label` / `addLabel` / option-label values of
+  // `previews/block-config.ts`; that file stores the KEY and the inspector
+  // resolves it through `t()` at render. Key shape is derived from the label's
+  // position in BLOCK_CONFIG and pinned by
+  // `previews/__tests__/block-config-i18n.test.ts` — see that file's header.
+  'engine.inspector.pageBlock.field.object-grid.objectName': 'Object',
+  'engine.inspector.pageBlock.field.object-grid.columns': 'Columns',
+  'engine.inspector.pageBlock.field.object-grid.pageSize': 'Page size',
+  'engine.inspector.pageBlock.field.object-grid.striped': 'Striped rows',
+  'engine.inspector.pageBlock.field.object-grid.bordered': 'Bordered',
+  'engine.inspector.pageBlock.field.object-form.objectName': 'Object',
+  'engine.inspector.pageBlock.field.object-form.mode': 'Mode',
+  'engine.inspector.pageBlock.option.mode.create': 'Create',
+  'engine.inspector.pageBlock.option.mode.edit': 'Edit',
+  'engine.inspector.pageBlock.option.mode.view': 'View',
+  'engine.inspector.pageBlock.field.object-form.formType': 'Form type',
+  'engine.inspector.pageBlock.option.formType.simple': 'Simple',
+  'engine.inspector.pageBlock.option.formType.tabbed': 'Tabbed',
+  'engine.inspector.pageBlock.option.formType.wizard': 'Wizard',
+  'engine.inspector.pageBlock.option.formType.split': 'Split',
+  'engine.inspector.pageBlock.option.formType.drawer': 'Drawer',
+  'engine.inspector.pageBlock.option.formType.modal': 'Modal',
+  'engine.inspector.pageBlock.field.object-form.layout': 'Layout',
+  'engine.inspector.pageBlock.option.layout.vertical': 'Vertical',
+  'engine.inspector.pageBlock.option.layout.horizontal': 'Horizontal',
+  'engine.inspector.pageBlock.option.layout.inline': 'Inline',
+  'engine.inspector.pageBlock.option.layout.grid': 'Grid',
+  'engine.inspector.pageBlock.field.object-form.columns': 'Columns (grid layout)',
+  'engine.inspector.pageBlock.field.object-form.fields': 'Fields',
+  'engine.inspector.pageBlock.field.object-form.title': 'Title',
+  'engine.inspector.pageBlock.field.object-form.description': 'Description',
+  'engine.inspector.pageBlock.field.object-metric.objectName': 'Object',
+  'engine.inspector.pageBlock.field.object-metric.label': 'Label',
+  'engine.inspector.pageBlock.field.object-metric.description': 'Description',
+  'engine.inspector.pageBlock.field.object-metric.icon': 'Icon',
+  'engine.inspector.pageBlock.field.object-metric.colorVariant': 'Color',
+  'engine.inspector.pageBlock.option.colorVariant.default': 'Default',
+  'engine.inspector.pageBlock.option.colorVariant.blue': 'Blue',
+  'engine.inspector.pageBlock.option.colorVariant.teal': 'Teal',
+  'engine.inspector.pageBlock.option.colorVariant.orange': 'Orange',
+  'engine.inspector.pageBlock.option.colorVariant.purple': 'Purple',
+  'engine.inspector.pageBlock.option.colorVariant.success': 'Success',
+  'engine.inspector.pageBlock.option.colorVariant.warning': 'Warning',
+  'engine.inspector.pageBlock.option.colorVariant.danger': 'Danger',
+  'engine.inspector.pageBlock.field.object-metric.format': 'Format',
+  'engine.inspector.pageBlock.option.format.number': 'Number',
+  'engine.inspector.pageBlock.option.format.currency': 'Currency',
+  'engine.inspector.pageBlock.option.format.percent': 'Percent',
+  'engine.inspector.pageBlock.field.object-metric.prefix': 'Prefix',
+  'engine.inspector.pageBlock.field.object-metric.suffix': 'Suffix',
+  'engine.inspector.pageBlock.field.object-kanban.objectName': 'Object',
+  'engine.inspector.pageBlock.field.object-kanban.groupField': 'Group by field',
+  'engine.inspector.pageBlock.field.object-kanban.titleField': 'Title field',
+  'engine.inspector.pageBlock.field.object-kanban.cardFields': 'Card fields',
+  'engine.inspector.pageBlock.field.grid.columns': 'Columns',
+  'engine.inspector.pageBlock.field.grid.gap': 'Gap',
+  'engine.inspector.pageBlock.field.element:text.content': 'Content',
+  'engine.inspector.pageBlock.field.element:text.variant': 'Variant',
+  'engine.inspector.pageBlock.option.variant.heading': 'Heading',
+  'engine.inspector.pageBlock.option.variant.subheading': 'Subheading',
+  'engine.inspector.pageBlock.option.variant.body': 'Body',
+  'engine.inspector.pageBlock.option.variant.caption': 'Caption',
+  'engine.inspector.pageBlock.field.element:text.align': 'Align',
+  'engine.inspector.pageBlock.option.align.left': 'Left',
+  'engine.inspector.pageBlock.option.align.center': 'Center',
+  'engine.inspector.pageBlock.option.align.right': 'Right',
+  'engine.inspector.pageBlock.field.element:image.src': 'Source URL',
+  'engine.inspector.pageBlock.field.element:image.alt': 'Alt text',
+  'engine.inspector.pageBlock.field.element:image.fit': 'Fit',
+  'engine.inspector.pageBlock.option.fit.cover': 'Cover',
+  'engine.inspector.pageBlock.option.fit.contain': 'Contain',
+  'engine.inspector.pageBlock.option.fit.fill': 'Fill',
+  'engine.inspector.pageBlock.field.element:definition-list.items': 'Items',
+  'engine.inspector.pageBlock.add.element:definition-list.items': 'Add item',
+  'engine.inspector.pageBlock.field.element:definition-list.items.label': 'Label',
+  'engine.inspector.pageBlock.field.element:definition-list.items.value': 'Value',
+  'engine.inspector.pageBlock.field.element:definition-list.columns': 'Columns (1 or 2)',
+  'engine.inspector.pageBlock.field.element:definition-list.inline': 'Inline (label · value)',
+  'engine.inspector.pageBlock.field.element:repeater.object': 'Object',
+  'engine.inspector.pageBlock.field.element:repeater.titleField': 'Title field',
+  'engine.inspector.pageBlock.field.element:repeater.fields': 'Fields',
+  'engine.inspector.pageBlock.field.element:repeater.limit': 'Limit',
+  'engine.inspector.pageBlock.field.element:repeater.emptyText': 'Empty text',
+  'engine.inspector.pageBlock.field.element:repeater.divided': 'Dividers between rows',
+  'engine.inspector.pageBlock.field.element:number.object': 'Object',
+  'engine.inspector.pageBlock.field.element:number.field': 'Field',
+  'engine.inspector.pageBlock.field.element:number.aggregate': 'Aggregate',
+  'engine.inspector.pageBlock.option.aggregate.count': 'Count',
+  'engine.inspector.pageBlock.option.aggregate.sum': 'Sum',
+  'engine.inspector.pageBlock.option.aggregate.avg': 'Average',
+  'engine.inspector.pageBlock.option.aggregate.min': 'Min',
+  'engine.inspector.pageBlock.option.aggregate.max': 'Max',
+  'engine.inspector.pageBlock.field.element:number.format': 'Format',
+  'engine.inspector.pageBlock.field.element:number.prefix': 'Prefix',
+  'engine.inspector.pageBlock.field.element:number.suffix': 'Suffix',
+  'engine.inspector.pageBlock.field.element:button.label': 'Label',
+  'engine.inspector.pageBlock.field.element:button.variant': 'Variant',
+  'engine.inspector.pageBlock.option.variant.primary': 'Primary',
+  'engine.inspector.pageBlock.option.variant.secondary': 'Secondary',
+  'engine.inspector.pageBlock.option.variant.danger': 'Danger',
+  'engine.inspector.pageBlock.option.variant.ghost': 'Ghost',
+  'engine.inspector.pageBlock.option.variant.link': 'Link',
+  'engine.inspector.pageBlock.field.element:button.size': 'Size',
+  'engine.inspector.pageBlock.option.size.small': 'Small',
+  'engine.inspector.pageBlock.option.size.medium': 'Medium',
+  'engine.inspector.pageBlock.option.size.large': 'Large',
+  'engine.inspector.pageBlock.field.element:button.icon': 'Icon',
+  'engine.inspector.pageBlock.field.element:button.action': 'Action',
+  'engine.inspector.pageBlock.field.page:header.title': 'Title',
+  'engine.inspector.pageBlock.field.page:header.subtitle': 'Subtitle',
+  'engine.inspector.pageBlock.field.page:header.icon': 'Icon',
+  'engine.inspector.pageBlock.field.page:header.breadcrumb': 'Show breadcrumb',
+  'engine.inspector.pageBlock.field.page:card.title': 'Title',
+  'engine.inspector.pageBlock.field.page:card.bordered': 'Bordered',
+  'engine.inspector.pageBlock.field.page:tabs.items': 'Tabs',
+  'engine.inspector.pageBlock.add.page:tabs.items': 'Add tab',
+  'engine.inspector.pageBlock.field.page:tabs.items.key': 'Key',
+  'engine.inspector.pageBlock.field.page:tabs.items.label': 'Label',
+  'engine.inspector.pageBlock.field.page:accordion.title': 'Title',
+  'engine.inspector.pageBlock.field.page:accordion.items': 'Sections',
+  'engine.inspector.pageBlock.add.page:accordion.items': 'Add section',
+  'engine.inspector.pageBlock.field.page:accordion.items.value': 'Key',
+  'engine.inspector.pageBlock.field.page:accordion.items.label': 'Label',
+  'engine.inspector.pageBlock.field.record:related_list.objectName': 'Object',
+  'engine.inspector.pageBlock.field.record:related_list.relationshipField': 'Relationship field',
+  'engine.inspector.pageBlock.field.record:related_list.title': 'Title',
+  'engine.inspector.pageBlock.field.record:related_list.limit': 'Limit',
+  'engine.inspector.pageBlock.field.record:highlights.fields': 'Fields',
+  'engine.inspector.pageBlock.field.record:details.sections': 'Sections',
+  'engine.inspector.pageBlock.add.record:details.sections': 'Add section',
+  'engine.inspector.pageBlock.field.record:details.sections.name': 'Name (i18n key)',
+  'engine.inspector.pageBlock.field.record:details.sections.label': 'Label',
+  'engine.inspector.pageBlock.field.record:details.sections.columns': 'Columns',
+  'engine.inspector.pageBlock.field.record:details.sections.fields': 'Fields',
+  'engine.inspector.pageBlock.field.record:alert.severity': 'Severity',
+  'engine.inspector.pageBlock.option.severity.info': 'Info',
+  'engine.inspector.pageBlock.option.severity.warning': 'Warning',
+  'engine.inspector.pageBlock.option.severity.error': 'Error',
+  'engine.inspector.pageBlock.option.severity.success': 'Success',
+  'engine.inspector.pageBlock.field.record:alert.title': 'Title',
+  'engine.inspector.pageBlock.field.record:alert.body': 'Body',
+  'engine.inspector.pageBlock.field.record:alert.icon': 'Icon',
+  'engine.inspector.pageBlock.field.record:alert.dismissible': 'Dismissible',
+  'engine.inspector.pageBlock.field.record:path.statusField': 'Status field',
+  'engine.inspector.pageBlock.field.record:path.stages': 'Stages',
+  'engine.inspector.pageBlock.add.record:path.stages': 'Add stage',
+  'engine.inspector.pageBlock.field.record:path.stages.value': 'Value',
+  'engine.inspector.pageBlock.field.record:path.stages.label': 'Label',
+  'engine.inspector.pageBlock.field.record:quick_actions.actionNames': 'Action names',
+  'engine.inspector.pageBlock.field.record:quick_actions.location': 'Location',
+  'engine.inspector.pageBlock.option.location.record_header': 'Record header',
+  'engine.inspector.pageBlock.option.location.record_more': 'Record more menu',
+  'engine.inspector.pageBlock.option.location.record_section': 'Record section',
+  'engine.inspector.pageBlock.option.location.record_related': 'Record related',
+  'engine.inspector.pageBlock.option.location.list_toolbar': 'List toolbar',
+  'engine.inspector.pageBlock.option.location.list_item': 'List item',
+  'engine.inspector.pageBlock.option.location.global_nav': 'Global nav',
+  'engine.inspector.pageBlock.field.ai:input.agentName': 'Agent',
+  'engine.inspector.pageBlock.field.ai:input.placeholder': 'Input placeholder',
   // Report default ("home") inspector
   'engine.inspector.report.kind': 'Report',
   'engine.inspector.report.close': 'Close report',
@@ -2037,6 +2197,163 @@ const ENGINE_STRINGS_ZH: Record<string, string> = {
   'engine.inspector.pageBlock.advanced': '高级属性',
   'engine.inspector.pageBlock.remove': '删除区块',
   'engine.inspector.pageBlock.outlineLabel': '区块',
+  // 页面区块检查器 —— curated 属性 label(#3913)。
+  // 键形状与 en 侧一一对应,由 `previews/__tests__/block-config-i18n.test.ts`
+  // 按 BLOCK_CONFIG 的结构重新推导并断言两语齐备。
+  'engine.inspector.pageBlock.field.object-grid.objectName': '对象',
+  'engine.inspector.pageBlock.field.object-grid.columns': '列',
+  'engine.inspector.pageBlock.field.object-grid.pageSize': '每页条数',
+  'engine.inspector.pageBlock.field.object-grid.striped': '斑马纹行',
+  'engine.inspector.pageBlock.field.object-grid.bordered': '显示边框',
+  'engine.inspector.pageBlock.field.object-form.objectName': '对象',
+  'engine.inspector.pageBlock.field.object-form.mode': '模式',
+  'engine.inspector.pageBlock.option.mode.create': '新建',
+  'engine.inspector.pageBlock.option.mode.edit': '编辑',
+  'engine.inspector.pageBlock.option.mode.view': '查看',
+  'engine.inspector.pageBlock.field.object-form.formType': '表单类型',
+  'engine.inspector.pageBlock.option.formType.simple': '简单',
+  'engine.inspector.pageBlock.option.formType.tabbed': '标签页',
+  'engine.inspector.pageBlock.option.formType.wizard': '向导',
+  'engine.inspector.pageBlock.option.formType.split': '分栏',
+  'engine.inspector.pageBlock.option.formType.drawer': '抽屉',
+  'engine.inspector.pageBlock.option.formType.modal': '弹窗',
+  'engine.inspector.pageBlock.field.object-form.layout': '布局',
+  'engine.inspector.pageBlock.option.layout.vertical': '纵向',
+  'engine.inspector.pageBlock.option.layout.horizontal': '横向',
+  'engine.inspector.pageBlock.option.layout.inline': '行内',
+  'engine.inspector.pageBlock.option.layout.grid': '网格',
+  'engine.inspector.pageBlock.field.object-form.columns': '列数（网格布局）',
+  'engine.inspector.pageBlock.field.object-form.fields': '字段',
+  'engine.inspector.pageBlock.field.object-form.title': '标题',
+  'engine.inspector.pageBlock.field.object-form.description': '描述',
+  'engine.inspector.pageBlock.field.object-metric.objectName': '对象',
+  'engine.inspector.pageBlock.field.object-metric.label': '标签',
+  'engine.inspector.pageBlock.field.object-metric.description': '描述',
+  'engine.inspector.pageBlock.field.object-metric.icon': '图标',
+  'engine.inspector.pageBlock.field.object-metric.colorVariant': '颜色',
+  'engine.inspector.pageBlock.option.colorVariant.default': '默认',
+  'engine.inspector.pageBlock.option.colorVariant.blue': '蓝色',
+  'engine.inspector.pageBlock.option.colorVariant.teal': '青色',
+  'engine.inspector.pageBlock.option.colorVariant.orange': '橙色',
+  'engine.inspector.pageBlock.option.colorVariant.purple': '紫色',
+  'engine.inspector.pageBlock.option.colorVariant.success': '成功',
+  'engine.inspector.pageBlock.option.colorVariant.warning': '警告',
+  'engine.inspector.pageBlock.option.colorVariant.danger': '危险',
+  'engine.inspector.pageBlock.field.object-metric.format': '格式',
+  'engine.inspector.pageBlock.option.format.number': '数字',
+  'engine.inspector.pageBlock.option.format.currency': '货币',
+  'engine.inspector.pageBlock.option.format.percent': '百分比',
+  'engine.inspector.pageBlock.field.object-metric.prefix': '前缀',
+  'engine.inspector.pageBlock.field.object-metric.suffix': '后缀',
+  'engine.inspector.pageBlock.field.object-kanban.objectName': '对象',
+  'engine.inspector.pageBlock.field.object-kanban.groupField': '分组字段',
+  'engine.inspector.pageBlock.field.object-kanban.titleField': '标题字段',
+  'engine.inspector.pageBlock.field.object-kanban.cardFields': '卡片字段',
+  'engine.inspector.pageBlock.field.grid.columns': '列数',
+  'engine.inspector.pageBlock.field.grid.gap': '间距',
+  'engine.inspector.pageBlock.field.element:text.content': '内容',
+  'engine.inspector.pageBlock.field.element:text.variant': '样式',
+  'engine.inspector.pageBlock.option.variant.heading': '标题',
+  'engine.inspector.pageBlock.option.variant.subheading': '副标题',
+  'engine.inspector.pageBlock.option.variant.body': '正文',
+  'engine.inspector.pageBlock.option.variant.caption': '说明文字',
+  'engine.inspector.pageBlock.field.element:text.align': '对齐',
+  'engine.inspector.pageBlock.option.align.left': '左对齐',
+  'engine.inspector.pageBlock.option.align.center': '居中',
+  'engine.inspector.pageBlock.option.align.right': '右对齐',
+  'engine.inspector.pageBlock.field.element:image.src': '图片地址',
+  'engine.inspector.pageBlock.field.element:image.alt': '替代文本',
+  'engine.inspector.pageBlock.field.element:image.fit': '填充方式',
+  'engine.inspector.pageBlock.option.fit.cover': '覆盖',
+  'engine.inspector.pageBlock.option.fit.contain': '包含',
+  'engine.inspector.pageBlock.option.fit.fill': '拉伸',
+  'engine.inspector.pageBlock.field.element:definition-list.items': '条目',
+  'engine.inspector.pageBlock.add.element:definition-list.items': '添加条目',
+  'engine.inspector.pageBlock.field.element:definition-list.items.label': '标签',
+  'engine.inspector.pageBlock.field.element:definition-list.items.value': '值',
+  'engine.inspector.pageBlock.field.element:definition-list.columns': '列数（1 或 2）',
+  'engine.inspector.pageBlock.field.element:definition-list.inline': '行内（标签 · 值）',
+  'engine.inspector.pageBlock.field.element:repeater.object': '对象',
+  'engine.inspector.pageBlock.field.element:repeater.titleField': '标题字段',
+  'engine.inspector.pageBlock.field.element:repeater.fields': '字段',
+  'engine.inspector.pageBlock.field.element:repeater.limit': '条数上限',
+  'engine.inspector.pageBlock.field.element:repeater.emptyText': '空数据提示',
+  'engine.inspector.pageBlock.field.element:repeater.divided': '行间分隔线',
+  'engine.inspector.pageBlock.field.element:number.object': '对象',
+  'engine.inspector.pageBlock.field.element:number.field': '字段',
+  'engine.inspector.pageBlock.field.element:number.aggregate': '聚合方式',
+  'engine.inspector.pageBlock.option.aggregate.count': '计数',
+  'engine.inspector.pageBlock.option.aggregate.sum': '求和',
+  'engine.inspector.pageBlock.option.aggregate.avg': '平均值',
+  'engine.inspector.pageBlock.option.aggregate.min': '最小值',
+  'engine.inspector.pageBlock.option.aggregate.max': '最大值',
+  'engine.inspector.pageBlock.field.element:number.format': '格式',
+  'engine.inspector.pageBlock.field.element:number.prefix': '前缀',
+  'engine.inspector.pageBlock.field.element:number.suffix': '后缀',
+  'engine.inspector.pageBlock.field.element:button.label': '按钮文字',
+  'engine.inspector.pageBlock.field.element:button.variant': '样式',
+  'engine.inspector.pageBlock.option.variant.primary': '主要',
+  'engine.inspector.pageBlock.option.variant.secondary': '次要',
+  'engine.inspector.pageBlock.option.variant.danger': '危险',
+  'engine.inspector.pageBlock.option.variant.ghost': '幽灵',
+  'engine.inspector.pageBlock.option.variant.link': '链接',
+  'engine.inspector.pageBlock.field.element:button.size': '尺寸',
+  'engine.inspector.pageBlock.option.size.small': '小',
+  'engine.inspector.pageBlock.option.size.medium': '中',
+  'engine.inspector.pageBlock.option.size.large': '大',
+  'engine.inspector.pageBlock.field.element:button.icon': '图标',
+  'engine.inspector.pageBlock.field.element:button.action': '动作',
+  'engine.inspector.pageBlock.field.page:header.title': '标题',
+  'engine.inspector.pageBlock.field.page:header.subtitle': '副标题',
+  'engine.inspector.pageBlock.field.page:header.icon': '图标',
+  'engine.inspector.pageBlock.field.page:header.breadcrumb': '显示面包屑',
+  'engine.inspector.pageBlock.field.page:card.title': '标题',
+  'engine.inspector.pageBlock.field.page:card.bordered': '显示边框',
+  'engine.inspector.pageBlock.field.page:tabs.items': '标签页',
+  'engine.inspector.pageBlock.add.page:tabs.items': '添加标签页',
+  'engine.inspector.pageBlock.field.page:tabs.items.key': '键',
+  'engine.inspector.pageBlock.field.page:tabs.items.label': '标签',
+  'engine.inspector.pageBlock.field.page:accordion.title': '标题',
+  'engine.inspector.pageBlock.field.page:accordion.items': '分区',
+  'engine.inspector.pageBlock.add.page:accordion.items': '添加分区',
+  'engine.inspector.pageBlock.field.page:accordion.items.value': '键',
+  'engine.inspector.pageBlock.field.page:accordion.items.label': '标签',
+  'engine.inspector.pageBlock.field.record:related_list.objectName': '对象',
+  'engine.inspector.pageBlock.field.record:related_list.relationshipField': '关联字段',
+  'engine.inspector.pageBlock.field.record:related_list.title': '标题',
+  'engine.inspector.pageBlock.field.record:related_list.limit': '条数上限',
+  'engine.inspector.pageBlock.field.record:highlights.fields': '字段',
+  'engine.inspector.pageBlock.field.record:details.sections': '分区',
+  'engine.inspector.pageBlock.add.record:details.sections': '添加分区',
+  'engine.inspector.pageBlock.field.record:details.sections.name': '名称（i18n 键）',
+  'engine.inspector.pageBlock.field.record:details.sections.label': '标签',
+  'engine.inspector.pageBlock.field.record:details.sections.columns': '列数',
+  'engine.inspector.pageBlock.field.record:details.sections.fields': '字段',
+  'engine.inspector.pageBlock.field.record:alert.severity': '严重度',
+  'engine.inspector.pageBlock.option.severity.info': '信息',
+  'engine.inspector.pageBlock.option.severity.warning': '警告',
+  'engine.inspector.pageBlock.option.severity.error': '错误',
+  'engine.inspector.pageBlock.option.severity.success': '成功',
+  'engine.inspector.pageBlock.field.record:alert.title': '标题',
+  'engine.inspector.pageBlock.field.record:alert.body': '正文',
+  'engine.inspector.pageBlock.field.record:alert.icon': '图标',
+  'engine.inspector.pageBlock.field.record:alert.dismissible': '可关闭',
+  'engine.inspector.pageBlock.field.record:path.statusField': '状态字段',
+  'engine.inspector.pageBlock.field.record:path.stages': '阶段',
+  'engine.inspector.pageBlock.add.record:path.stages': '添加阶段',
+  'engine.inspector.pageBlock.field.record:path.stages.value': '值',
+  'engine.inspector.pageBlock.field.record:path.stages.label': '标签',
+  'engine.inspector.pageBlock.field.record:quick_actions.actionNames': '动作名称',
+  'engine.inspector.pageBlock.field.record:quick_actions.location': '位置',
+  'engine.inspector.pageBlock.option.location.record_header': '记录头部',
+  'engine.inspector.pageBlock.option.location.record_more': '记录更多菜单',
+  'engine.inspector.pageBlock.option.location.record_section': '记录分区',
+  'engine.inspector.pageBlock.option.location.record_related': '记录关联列表',
+  'engine.inspector.pageBlock.option.location.list_toolbar': '列表工具栏',
+  'engine.inspector.pageBlock.option.location.list_item': '列表行',
+  'engine.inspector.pageBlock.option.location.global_nav': '全局导航',
+  'engine.inspector.pageBlock.field.ai:input.agentName': '智能体',
+  'engine.inspector.pageBlock.field.ai:input.placeholder': '输入框占位提示',
   // Report default ("home") inspector
   'engine.inspector.report.kind': '报表',
   'engine.inspector.report.close': '关闭报表',
diff --git a/packages/app-shell/src/views/metadata-admin/inspectors/PageBlockInspector.i18n.test.tsx b/packages/app-shell/src/views/metadata-admin/inspectors/PageBlockInspector.i18n.test.tsx
new file mode 100644
index 000000000..3d1b48aca
--- /dev/null
+++ b/packages/app-shell/src/views/metadata-admin/inspectors/PageBlockInspector.i18n.test.tsx
@@ -0,0 +1,172 @@
+// Copyright (c) 2025 ObjectStack. Licensed under the Apache-2.0 license.
+
+/**
+ * objectui#3913 — the PROPERTIES panel renders in the session's language.
+ *
+ * The sibling `previews/__tests__/block-config-i18n.test.ts` pins the TABLE
+ * (every label is a key its position implies, and both locales define it). That
+ * is a fact about data. This file pins the fact about the screen, and they are
+ * different: `renderField` reaches `f.label` from eleven places — eight as a
+ * `label=` prop, three as `<Label>` children — plus option lists handed to
+ * `InspectorSelectField` / `ColorVariantPicker`, and each is a separate chance
+ * to forward a raw key. A table full of correct keys still renders
+ * `engine.inspector.pageBlock.field.…` on screen if one branch skips `t()`.
+ *
+ * So the assertions here are deliberately about visible strings, and they run
+ * the same block twice — once per locale — because the defect was never "no
+ * translation exists" but "this panel does not ask for one".
+ */
+
+import { describe, it, expect, afterEach } from 'vitest';
+import { render, screen, cleanup } from '@testing-library/react';
+import { PageSchema } from '@objectstack/spec/ui';
+import { PageBlockInspector } from './PageBlockInspector';
+
+afterEach(cleanup);
+
+const BLOCK_PATH = 'regions[0].components[0]';
+
+/** A record page carrying one block of `type`, with the given properties. */
+function pageDraft(type: string, properties: Record<string, unknown> = {}): Record<string, unknown> {
+  return PageSchema.parse({
+    name: 'contact_record',
+    label: 'Contact',
+    type: 'record',
+    object: 'contact',
+    template: 'default',
+    regions: [{ name: 'main', components: [{ type, id: 'b1', properties }] }],
+  }) as unknown as Record<string, unknown>;
+}
+
+function renderInspector(draft: Record<string, unknown>, locale: 'en-US' | 'zh-CN') {
+  render(
+    <PageBlockInspector
+      type="page"
+      name="contact_record"
+      draft={draft}
+      selection={{ kind: 'block', id: BLOCK_PATH }}
+      onPatch={() => {}}
+      onClearSelection={() => {}}
+      readOnly={false}
+      locale={locale as never}
+    />,
+  );
+}
+
+/** No raw translation key may reach the DOM in any locale. */
+function expectNoRawKeys() {
+  expect(document.body.textContent ?? '').not.toContain('engine.inspector.pageBlock.');
+}
+
+describe('PageBlockInspector PROPERTIES labels follow the locale (#3913)', () => {
+  it('renders curated field labels in Chinese under zh-CN', () => {
+    renderInspector(pageDraft('object-grid'), 'zh-CN');
+
+    // `object-grid`: object-picker + field-list + number + two booleans, i.e.
+    // four different `renderField` branches in one panel.
+    expect(screen.getByText('对象')).toBeTruthy();
+    expect(screen.getByText('列')).toBeTruthy();
+    expect(screen.getByText('每页条数')).toBeTruthy();
+    expect(screen.getByText('斑马纹行')).toBeTruthy();
+    expect(screen.getByText('显示边框')).toBeTruthy();
+    // The English literals must be gone, not merely joined by Chinese ones.
+    expect(screen.queryByText('Striped rows')).toBeNull();
+    expect(screen.queryByText('Page size')).toBeNull();
+    expectNoRawKeys();
+  });
+
+  it('renders the same panel in English under en-US, unchanged', () => {
+    renderInspector(pageDraft('object-grid'), 'en-US');
+
+    expect(screen.getByText('Object')).toBeTruthy();
+    expect(screen.getByText('Columns')).toBeTruthy();
+    expect(screen.getByText('Page size')).toBeTruthy();
+    expect(screen.getByText('Striped rows')).toBeTruthy();
+    expect(screen.getByText('Bordered')).toBeTruthy();
+    expectNoRawKeys();
+  });
+
+  it('translates the array add button — the branch that had no key at all', () => {
+    // `addLabel` was optional and the array branch fell back to a bare English
+    // `'Add'`. It is now required, so that fallback is deleted rather than
+    // translated — a new array field cannot compile without its key.
+    renderInspector(pageDraft('record:details', { sections: [{ label: 'Contact info' }] }), 'zh-CN');
+
+    expect(screen.getByText('分区')).toBeTruthy();
+    expect(screen.getByText('添加分区')).toBeTruthy();
+    expect(screen.queryByText('Add section')).toBeNull();
+    expectNoRawKeys();
+  });
+
+  /**
+   * NOT asserted anywhere above, deliberately: that this panel contains no
+   * English at all. It still does, and the boundary is worth pinning.
+   *
+   * `FieldListField` and the `string-list` branch render their row-adder as a
+   * hardcoded `<Plus /> Add`, and `aria-label`s ("Remove", "Remove item"), the
+   * JSON parse error ("Invalid JSON") and two placeholders ("field name",
+   * "snake_case object") are literals in `PageBlockInspector.tsx` itself. None
+   * of them was ever a `block-config` label — different mechanism, different
+   * surface — so they are outside objectui#3913 and filed as objectui#3963.
+   *
+   * Asserting their PRESENCE (rather than quietly not mentioning them) means the
+   * day objectui#3963 lands, this case fails and has to be tightened, instead of
+   * the two fixes silently overlapping and leaving nobody sure what is covered.
+   */
+  it('leaves only the known non-block-config chrome in English (objectui#3963)', () => {
+    renderInspector(pageDraft('record:details', { sections: [{ label: 'Contact info' }] }), 'zh-CN');
+
+    // The section's `fields` item editor is a `field-list`; its adder is chrome.
+    const adders = screen.getAllByRole('button').filter((b) => b.textContent?.trim() === 'Add');
+    expect(adders.length).toBeGreaterThan(0);
+    expect(screen.getAllByLabelText('Remove item').length).toBeGreaterThan(0);
+  });
+
+  it('translates nested array-item labels, not just the container', () => {
+    // Item fields recurse through `renderField` with a different read/write
+    // pair; a fix applied only to the top level would leave these English.
+    renderInspector(pageDraft('record:details', { sections: [{ label: 'Contact info' }] }), 'zh-CN');
+
+    expect(screen.getByText('名称（i18n 键）')).toBeTruthy();
+    expect(screen.getByText('标签')).toBeTruthy();
+    expect(screen.getByText('列数')).toBeTruthy();
+    expect(screen.getByText('字段')).toBeTruthy();
+    expect(screen.queryByText('Name (i18n key)')).toBeNull();
+  });
+
+  it('translates select OPTION labels, not only the field label', () => {
+    // Options are a separate hop: they are passed as data to
+    // `InspectorSelectField`, so translating `f.label` alone leaves the
+    // dropdown's own text English. `severity` renders its current value.
+    renderInspector(pageDraft('record:alert', { severity: 'warning' }), 'zh-CN');
+
+    expect(screen.getByText('严重度')).toBeTruthy();
+    expect(screen.getByText('警告')).toBeTruthy();
+    expect(screen.queryByText('Warning')).toBeNull();
+    expect(screen.getByText('可关闭')).toBeTruthy();
+    expectNoRawKeys();
+  });
+
+  it('translates color-swatch option labels (the accessible name)', () => {
+    // `ColorVariantPicker` renders option labels as `aria-label`/`title` only —
+    // invisible to a text query, and exactly where an untranslated key hides.
+    renderInspector(pageDraft('object-metric', { colorVariant: 'blue' }), 'zh-CN');
+
+    expect(screen.getByLabelText('蓝色')).toBeTruthy();
+    expect(screen.getByLabelText('成功')).toBeTruthy();
+    expect(screen.queryByLabelText('Blue')).toBeNull();
+  });
+
+  it('keeps the panel chrome and its contents in ONE language', () => {
+    // The bug in one assertion: the section heading was already translated
+    // while everything under it was not.
+    renderInspector(pageDraft('page:header'), 'zh-CN');
+
+    expect(screen.getByText('属性')).toBeTruthy(); // chrome, already worked
+    expect(screen.getByText('标题')).toBeTruthy(); // contents, the fix
+    expect(screen.getByText('副标题')).toBeTruthy();
+    expect(screen.getByText('显示面包屑')).toBeTruthy();
+    expect(screen.queryByText('Subtitle')).toBeNull();
+    expect(screen.queryByText('Show breadcrumb')).toBeNull();
+  });
+});
diff --git a/packages/app-shell/src/views/metadata-admin/inspectors/PageBlockInspector.tsx b/packages/app-shell/src/views/metadata-admin/inspectors/PageBlockInspector.tsx
index b6d970892..8c7fba7e8 100644
--- a/packages/app-shell/src/views/metadata-admin/inspectors/PageBlockInspector.tsx
+++ b/packages/app-shell/src/views/metadata-admin/inspectors/PageBlockInspector.tsx
@@ -378,6 +378,16 @@ export function PageBlockInspector({ selection, draft, onPatch, onClearSelection
     (key) => !curatedNames.has(key) && !STRUCTURAL_PROP_KEYS.has(key),
   );
 
+  // Curated labels are translation KEYS, not display text (#3913). The panel's
+  // chrome went through `t()` from the start while its contents did not, so a
+  // zh-CN admin read 「属性」 over a stack of English field names. `t()` returns
+  // the key unchanged when it is missing, so an untranslated field is loud in
+  // every locale rather than silently English in one.
+  const fieldLabel = (key: string) => t(key, locale);
+  /** Option labels are keys too — translate before handing them to a picker. */
+  const optionLabels = <T extends { value: string; label: string }>(options: T[]) =>
+    options.map((o) => ({ ...o, label: t(o.label, locale) }));
+
   // Generic, recursive field renderer. `read`/`write` abstract the value source
   // (the block's `properties` at the top level, or an item object inside an
   // `array` field), so the same code drives nested array-item editors.
@@ -391,39 +401,39 @@ export function PageBlockInspector({ selection, draft, onPatch, onClearSelection
     switch (f.kind) {
       case 'number':
         return (
-          <InspectorNumberField key={k} label={f.label}
+          <InspectorNumberField key={k} label={fieldLabel(f.label)}
             value={typeof read(f.name) === 'number' ? (read(f.name) as number) : undefined}
             placeholder={f.placeholder} onCommit={(v) => write(f.name, v)} disabled={readOnly} />
         );
       case 'boolean':
         return (
-          <InspectorCheckboxField key={k} label={f.label} value={!!read(f.name)}
+          <InspectorCheckboxField key={k} label={fieldLabel(f.label)} value={!!read(f.name)}
             onCommit={(v) => write(f.name, v)} disabled={readOnly} />
         );
       case 'color':
         return (
           <div key={k} className="space-y-1">
-            <Label className="text-xs text-muted-foreground">{f.label}</Label>
+            <Label className="text-xs text-muted-foreground">{fieldLabel(f.label)}</Label>
             <ColorVariantPicker
               value={read(f.name) != null ? String(read(f.name)) : undefined}
               onChange={(v) => write(f.name, v)}
               disabled={readOnly}
-              options={f.options}
+              options={f.options ? optionLabels(f.options) : undefined}
             />
           </div>
         );
       case 'select':
         return (
-          <InspectorSelectField key={k} label={f.label}
+          <InspectorSelectField key={k} label={fieldLabel(f.label)}
             value={read(f.name) != null ? String(read(f.name)) : undefined}
-            options={f.options} onCommit={(v) => write(f.name, v)} disabled={readOnly} />
+            options={optionLabels(f.options)} onCommit={(v) => write(f.name, v)} disabled={readOnly} />
         );
       case 'json':
         // Same editor the "Advanced" section uses, but reachable for a prop the
         // block does not have yet — Advanced enumerates existing keys only, so
         // without this a curated JSON prop could be edited and never added.
         return (
-          <InspectorJsonField key={k} label={f.label} value={read(f.name)}
+          <InspectorJsonField key={k} label={fieldLabel(f.label)} value={read(f.name)}
             placeholder={f.placeholder}
             onCommit={(v) => write(f.name, v)} disabled={readOnly} />
         );
@@ -431,7 +441,7 @@ export function PageBlockInspector({ selection, draft, onPatch, onClearSelection
         const arr = Array.isArray(read(f.name)) ? (read(f.name) as unknown[]) : [];
         return (
           <div key={k} className="space-y-1.5">
-            <Label className="text-xs text-muted-foreground">{f.label}</Label>
+            <Label className="text-xs text-muted-foreground">{fieldLabel(f.label)}</Label>
             {arr.map((s, i) => (
               <div key={i} className="flex items-center gap-1.5">
                 <Input className="h-8 text-sm" value={String(s ?? '')} placeholder={f.placeholder} disabled={readOnly}
@@ -454,7 +464,7 @@ export function PageBlockInspector({ selection, draft, onPatch, onClearSelection
         const arr = Array.isArray(read(f.name)) ? (read(f.name) as unknown[]) : [];
         return (
           <div key={k} className="space-y-2">
-            <Label className="text-xs text-muted-foreground">{f.label}</Label>
+            <Label className="text-xs text-muted-foreground">{fieldLabel(f.label)}</Label>
             {arr.map((item, i) => {
               const itemObj = item && typeof item === 'object' ? (item as Record<string, unknown>) : {};
               return (
@@ -479,7 +489,7 @@ export function PageBlockInspector({ selection, draft, onPatch, onClearSelection
             })}
             {!readOnly && (
               <Button type="button" variant="outline" size="sm" onClick={() => write(f.name, [...arr, {}])}>
-                <Plus className="mr-1 h-3.5 w-3.5" /> {f.addLabel || 'Add'}
+                <Plus className="mr-1 h-3.5 w-3.5" /> {fieldLabel(f.addLabel)}
               </Button>
             )}
           </div>
@@ -487,24 +497,24 @@ export function PageBlockInspector({ selection, draft, onPatch, onClearSelection
       }
       case 'object-picker':
         return (
-          <ObjectPickerField key={k} label={f.label}
+          <ObjectPickerField key={k} label={fieldLabel(f.label)}
             value={read(f.name) != null ? String(read(f.name)) : undefined}
             onCommit={(v) => write(f.name, v)} disabled={readOnly} />
         );
       case 'field-picker':
         return (
-          <FieldPickerField key={k} label={f.label} objectName={resolveObject(f)}
+          <FieldPickerField key={k} label={fieldLabel(f.label)} objectName={resolveObject(f)}
             value={read(f.name) != null ? String(read(f.name)) : undefined}
             onCommit={(v) => write(f.name, v)} disabled={readOnly} />
         );
       case 'field-list':
         return (
-          <FieldListField key={k} label={f.label} objectName={resolveObject(f)}
+          <FieldListField key={k} label={fieldLabel(f.label)} objectName={resolveObject(f)}
             value={read(f.name)} onChange={(v) => write(f.name, v)} disabled={readOnly} />
         );
       default:
         return (
-          <InspectorTextField key={k} label={f.label}
+          <InspectorTextField key={k} label={fieldLabel(f.label)}
             value={read(f.name) != null ? String(read(f.name)) : ''}
             placeholder={(f as any).placeholder} onCommit={(v) => write(f.name, v)} disabled={readOnly} />
         );
diff --git a/packages/app-shell/src/views/metadata-admin/previews/__tests__/block-config-i18n.test.ts b/packages/app-shell/src/views/metadata-admin/previews/__tests__/block-config-i18n.test.ts
new file mode 100644
index 000000000..00407bbe2
--- /dev/null
+++ b/packages/app-shell/src/views/metadata-admin/previews/__tests__/block-config-i18n.test.ts
@@ -0,0 +1,255 @@
+// Copyright (c) 2025 ObjectStack. Licensed under the Apache-2.0 license.
+
+/**
+ * objectui#3913 — every curated page-block label is a translation key that
+ * BOTH locales define, and the key is the one its POSITION implies.
+ *
+ * ## What was broken
+ *
+ * `PageBlockInspector`'s chrome went through `t('engine.inspector.pageBlock.*')`
+ * from the start; the panel's CONTENTS — the 152 field/option labels and 5
+ * `addLabel`s of `block-config.ts` — were English literals handed straight to
+ * the field components. A zh-CN admin opening any page block therefore read
+ * 「属性」 over a stack of English field names: two languages in one panel, no
+ * special data needed to reproduce.
+ *
+ * ## Why the assertions are two, not one
+ *
+ * "Does the key exist in both tables?" is the obvious check and it is not
+ * enough. The keys are near-identical strings differing by one segment
+ * (`…field.object-grid.columns` vs `…field.object-form.columns`), so the
+ * realistic mistake when adding a block is not a typo — it is copy-pasting a
+ * neighbouring block's key, which EXISTS in both locales and renders a plausible
+ * label belonging to a different property. An existence-only check is green for
+ * that, and the author reads a correct-looking panel that edits the wrong-named
+ * field.
+ *
+ * So the key is DERIVED here from the label's position in `BLOCK_CONFIG` and
+ * compared with what the table stores. Derivation is what makes the mistake
+ * mechanically visible, and it is the reason the key shape is positional in the
+ * first place rather than semantic.
+ *
+ *   field label          engine.inspector.pageBlock.field.<blockType>.<name>
+ *   nested item label    engine.inspector.pageBlock.field.<blockType>.<array>.<name>
+ *   array add button     engine.inspector.pageBlock.add.<blockType>.<name>
+ *   select/color option  engine.inspector.pageBlock.option.<fieldName>.<value>
+ *
+ * Option keys omit the block type on purpose (so `format`'s number/currency/
+ * percent are translated once and shared by `object-metric` and
+ * `element:number`); field keys carry it on purpose, because the same English
+ * word needs different Chinese per block — `element:button.label` is a button
+ * caption 「按钮文字」 while `page:tabs.items.label` is a tab title 「标签」.
+ *
+ * Completeness is asserted through `t()` rather than by importing the tables:
+ * `t()` returns the key unchanged on a miss, so `t(key, locale) === key` is
+ * exactly "this locale has no translation" — measured through the same accessor
+ * the component uses, not a private table this test would have to be given.
+ */
+
+import { describe, it, expect } from 'vitest';
+import { BLOCK_CONFIG, type BlockPropField } from '../block-config';
+import { t } from '../../i18n';
+
+const PREFIX = 'engine.inspector.pageBlock';
+
+/** One translatable label site: where it lives, what key that implies, what is stored. */
+interface LabelSite {
+  /** `field` | `add` | `option` — which key family. */
+  family: 'field' | 'add' | 'option';
+  /** The key the site's position implies. */
+  derived: string;
+  /** The key `block-config.ts` actually stores there. */
+  stored: string;
+  /** Human-readable position, for assertion messages. */
+  where: string;
+}
+
+/** Walk BLOCK_CONFIG and derive a key for every label / addLabel / option label. */
+function labelSites(): LabelSite[] {
+  const sites: LabelSite[] = [];
+
+  const walk = (f: BlockPropField, blockType: string, path: string[]) => {
+    const dotted = [...path, f.name].join('.');
+    sites.push({
+      family: 'field',
+      derived: `${PREFIX}.field.${blockType}.${dotted}`,
+      stored: f.label,
+      where: `${blockType}.${dotted} (label)`,
+    });
+
+    if (f.kind === 'array') {
+      sites.push({
+        family: 'add',
+        derived: `${PREFIX}.add.${blockType}.${dotted}`,
+        stored: f.addLabel,
+        where: `${blockType}.${dotted} (addLabel)`,
+      });
+      for (const itf of f.itemFields) walk(itf, blockType, [...path, f.name]);
+    }
+
+    // `select` always has options; `color` may. Both render their labels.
+    const options = (f as { options?: Array<{ value: string; label: string }> }).options;
+    if (Array.isArray(options)) {
+      for (const o of options) {
+        sites.push({
+          family: 'option',
+          derived: `${PREFIX}.option.${f.name}.${o.value}`,
+          stored: o.label,
+          where: `${blockType}.${dotted} option=${o.value}`,
+        });
+      }
+    }
+  };
+
+  for (const [blockType, fields] of Object.entries(BLOCK_CONFIG)) {
+    for (const f of fields) walk(f, blockType, []);
+  }
+  return sites;
+}
+
+const SITES = labelSites();
+
+/**
+ * Keys whose two locales are deliberately identical (an acronym, a symbol —
+ * nothing to translate). EMPTY today, and it is a ledger rather than a rule: a
+ * genuinely locale-invariant label is added here with its reason, so "the zh
+ * column is a copy of the en column" stays a red build everywhere else.
+ */
+const LOCALE_INVARIANT = new Set<string>();
+
+describe('block-config labels are translation keys (#3913)', () => {
+  it('collects every label site — the walk itself is not empty', () => {
+    // Guards the derivation: a refactor that stops finding labels would make
+    // every per-site assertion below vacuous by iterating nothing.
+    expect(SITES.length).toBeGreaterThan(150);
+    const families = SITES.reduce<Record<string, number>>((acc, s) => {
+      acc[s.family] = (acc[s.family] ?? 0) + 1;
+      return acc;
+    }, {});
+    // 152 `label:` + 5 `addLabel:` literals at the time of the fix; option sites
+    // are counted per USE, so shared option lists (`format`, `ALIGN_OPTS`) are
+    // visited once per referencing field.
+    expect(families.field).toBeGreaterThan(80);
+    expect(families.add).toBe(5);
+    expect(families.option).toBeGreaterThan(50);
+  });
+
+  it('stores exactly the key its position implies', () => {
+    // The copy-paste guard. A neighbouring block's key exists in both locales,
+    // so nothing else in this file would notice it.
+    const wrong = SITES.filter((s) => s.stored !== s.derived).map(
+      (s) => `${s.where}: stored '${s.stored}' but position implies '${s.derived}'`,
+    );
+    expect(wrong).toEqual([]);
+  });
+
+  it('no label is left as display text', () => {
+    // Belt to the braces above: an English literal cannot even look like a key.
+    const literals = SITES.filter((s) => !s.stored.startsWith(`${PREFIX}.`)).map(
+      (s) => `${s.where}: '${s.stored}'`,
+    );
+    expect(literals).toEqual([]);
+  });
+
+  it('every key resolves in en-US', () => {
+    const missing = SITES.filter((s) => t(s.derived, 'en-US') === s.derived).map((s) => s.derived);
+    expect([...new Set(missing)]).toEqual([]);
+  });
+
+  it('every key resolves in zh-CN', () => {
+    // The defect this issue filed, as a structural assertion: a field added to
+    // BLOCK_CONFIG without a zh translation is red here rather than shipping as
+    // an English box in a Chinese panel.
+    const missing = SITES.filter((s) => t(s.derived, 'zh-CN') === s.derived).map((s) => s.derived);
+    expect([...new Set(missing)]).toEqual([]);
+  });
+
+  it('zh-CN is actually translated, not a copy of en-US', () => {
+    const untranslated = SITES.filter(
+      (s) => !LOCALE_INVARIANT.has(s.derived) && t(s.derived, 'zh-CN') === t(s.derived, 'en-US'),
+    ).map((s) => `${s.derived} = '${t(s.derived, 'en-US')}'`);
+    // If a label really is locale-invariant, add it to LOCALE_INVARIANT above
+    // with the reason — do not weaken this assertion.
+    expect([...new Set(untranslated)]).toEqual([]);
+  });
+
+  it('one key never carries two different meanings', () => {
+    // Option keys drop the block type, so the same key is reached from several
+    // positions by design — but only ever for the same concept. Two positions
+    // sharing a key while meaning different things would translate one of them
+    // wrongly, and `t()` cannot tell.
+    const byKey = new Map<string, Set<string>>();
+    for (const s of SITES) {
+      if (!byKey.has(s.derived)) byKey.set(s.derived, new Set());
+      byKey.get(s.derived)!.add(s.family);
+    }
+    const crossFamily = [...byKey.entries()]
+      .filter(([, families]) => families.size > 1)
+      .map(([key, families]) => `${key}: ${[...families].join('+')}`);
+    expect(crossFamily).toEqual([]);
+
+    // A `field`/`add` key is positional and must therefore be unique outright;
+    // only `option` keys may legitimately repeat.
+    const positional = SITES.filter((s) => s.family !== 'option').map((s) => s.derived);
+    expect(positional.length).toBe(new Set(positional).size);
+  });
+});
+
+/**
+ * The English side must not have moved. `en-US` is this repo's baseline
+ * language and the table is what the drift discipline protects, so the fix is
+ * only correct if it changed WHERE the English text comes from and not the text
+ * itself. Sampled across every field kind plus all five add buttons — the
+ * remaining keys were substituted mechanically from the pre-change literals
+ * (see the PR), which is why a sample is a regression pin here rather than the
+ * proof of the migration.
+ */
+describe('en-US labels are unchanged by the key migration (#3913)', () => {
+  const EXPECTED: Record<string, string> = {
+    // object-picker / field-list / number / boolean
+    'engine.inspector.pageBlock.field.object-grid.objectName': 'Object',
+    'engine.inspector.pageBlock.field.object-grid.columns': 'Columns',
+    'engine.inspector.pageBlock.field.object-grid.pageSize': 'Page size',
+    'engine.inspector.pageBlock.field.object-grid.striped': 'Striped rows',
+    // the same field NAME in another block, with different text — the case that
+    // makes the key positional
+    'engine.inspector.pageBlock.field.object-form.columns': 'Columns (grid layout)',
+    'engine.inspector.pageBlock.field.element:definition-list.columns': 'Columns (1 or 2)',
+    'engine.inspector.pageBlock.field.grid.columns': 'Columns',
+    // text / json / color / field-picker
+    'engine.inspector.pageBlock.field.element:image.src': 'Source URL',
+    'engine.inspector.pageBlock.field.element:button.action': 'Action',
+    'engine.inspector.pageBlock.field.object-metric.colorVariant': 'Color',
+    'engine.inspector.pageBlock.field.object-kanban.groupField': 'Group by field',
+    // string-list / array container
+    'engine.inspector.pageBlock.field.record:quick_actions.actionNames': 'Action names',
+    'engine.inspector.pageBlock.field.record:details.sections': 'Sections',
+    // the #3819 label, whose wording is itself load-bearing
+    'engine.inspector.pageBlock.field.record:details.sections.name': 'Name (i18n key)',
+    // all five add buttons
+    'engine.inspector.pageBlock.add.element:definition-list.items': 'Add item',
+    'engine.inspector.pageBlock.add.page:tabs.items': 'Add tab',
+    'engine.inspector.pageBlock.add.page:accordion.items': 'Add section',
+    'engine.inspector.pageBlock.add.record:details.sections': 'Add section',
+    'engine.inspector.pageBlock.add.record:path.stages': 'Add stage',
+    // options, incl. the shared `format` list and the shared ALIGN_OPTS
+    'engine.inspector.pageBlock.option.format.currency': 'Currency',
+    'engine.inspector.pageBlock.option.align.center': 'Center',
+    'engine.inspector.pageBlock.option.location.record_more': 'Record more menu',
+    'engine.inspector.pageBlock.option.severity.warning': 'Warning',
+  };
+
+  it('renders the pre-change English text for every sampled key', () => {
+    for (const [key, text] of Object.entries(EXPECTED)) {
+      expect(t(key, 'en-US'), key).toBe(text);
+    }
+  });
+
+  it('every sampled key is one the table really reaches', () => {
+    // Without this, a renamed key would leave the sample above asserting
+    // `t()`'s key-passthrough against itself and passing.
+    const derived = new Set(SITES.map((s) => s.derived));
+    const orphans = Object.keys(EXPECTED).filter((k) => !derived.has(k));
+    expect(orphans).toEqual([]);
+  });
+});
diff --git a/packages/app-shell/src/views/metadata-admin/previews/__tests__/block-config.test.ts b/packages/app-shell/src/views/metadata-admin/previews/__tests__/block-config.test.ts
index df76968e7..7730b8b56 100644
--- a/packages/app-shell/src/views/metadata-admin/previews/__tests__/block-config.test.ts
+++ b/packages/app-shell/src/views/metadata-admin/previews/__tests__/block-config.test.ts
@@ -2,6 +2,7 @@ import { describe, it, expect } from 'vitest';
 import { PageComponentType, RecordDetailsProps } from '@objectstack/spec/ui';
 import { BLOCK_CONFIG, blockHasConfig } from '../block-config';
 import { BLOCK_TYPE_META, PALETTE_EXCLUSIONS } from '../block-types';
+import { t } from '../../i18n';
 
 describe('block-config', () => {
   it('exposes a configurable panel for every content block with authorable props', () => {
@@ -118,7 +119,14 @@ describe('record:details sections ↔ spec section-entry coverage (#3819)', () =
     // The label must say what the box is FOR. A bare "Name" next to "Label"
     // reads as a second display string, which is how an author ends up typing
     // a heading into the anchor.
-    expect(nameField!.label).toMatch(/i18n/i);
+    //
+    // Asserted on the RESOLVED label, in both locales, because `label` now
+    // holds a translation key (#3913). Matching /i18n/i against the key itself
+    // would be a claim about the key's spelling, not about the words an author
+    // reads — and it would pass or fail for reasons unrelated to the wording
+    // this case exists to protect.
+    expect(t(nameField!.label, 'en-US')).toMatch(/i18n/i);
+    expect(t(nameField!.label, 'zh-CN')).toMatch(/i18n/i);
   });
 
   it('lists `name` before `label` — the entry identity comes first', () => {
diff --git a/packages/app-shell/src/views/metadata-admin/previews/block-config.ts b/packages/app-shell/src/views/metadata-admin/previews/block-config.ts
index ad02713b9..9220fdfff 100644
--- a/packages/app-shell/src/views/metadata-admin/previews/block-config.ts
+++ b/packages/app-shell/src/views/metadata-admin/previews/block-config.ts
@@ -20,6 +20,36 @@
  *                                       Advanced only lists keys the block
  *                                       ALREADY has, so it can edit such a prop
  *                                       but never add one.
+ *
+ * ## `label` / `addLabel` hold a TRANSLATION KEY, not display text (#3913)
+ *
+ * Every `label`, every option `label` and every `addLabel` in this file is a key
+ * into `../i18n.ts`, resolved by `PageBlockInspector` through `t(key, locale)` at
+ * render. They used to be English literals, which is how a zh-CN admin got a
+ * panel headed 「属性」 with every box under it named in English — the section
+ * chrome went through `t()` and the panel's own content never did.
+ *
+ * The key is a function of WHERE the label lives, and that is the load-bearing
+ * part rather than a naming preference:
+ *
+ *   field label          engine.inspector.pageBlock.field.<blockType>.<name>
+ *   nested item label    engine.inspector.pageBlock.field.<blockType>.<array>.<name>
+ *   array add button     engine.inspector.pageBlock.add.<blockType>.<name>
+ *   select/color option  engine.inspector.pageBlock.option.<fieldName>.<value>
+ *
+ * `previews/__tests__/block-config-i18n.test.ts` re-derives all four shapes from
+ * the table's own structure and asserts (a) the stored key equals the derived
+ * one and (b) both locales define it. So a field added here without a
+ * translation is red, and so is a key copy-pasted from a neighbouring block —
+ * the second is the failure a bare "does the key exist?" check cannot see.
+ *
+ * Option keys deliberately omit the block type, so `format`'s number/currency/
+ * percent are translated once for `object-metric` and `element:number`. Field
+ * keys deliberately DO carry it, because the same English word needs different
+ * Chinese in different blocks: `element:button.label` is the button's caption
+ * (「按钮文字」) while `page:tabs.items.label` is a tab's title (「标签」), and
+ * `Add section` is 「添加分区」 here but 「添加分组」 in the form-layout canvas
+ * (`designer.canvas.addSection`). One key per meaning is why that is expressible.
  */
 
 /** Where a field/field-list picker resolves its object from:
@@ -27,13 +57,22 @@
  *  - 'self' — a sibling property on the same block (objectProp) */
 export type ObjectSource = { objectFrom: 'page' } | { objectFrom: 'self'; objectProp: string };
 
+/**
+ * One curated property editor. Every `label` is a translation key — see the
+ * file header for the four key shapes and the test that enforces them.
+ */
 export type BlockPropField =
   | { name: string; label: string; kind: 'text'; placeholder?: string }
   | { name: string; label: string; kind: 'number'; placeholder?: string }
   | { name: string; label: string; kind: 'boolean' }
   | { name: string; label: string; kind: 'select'; options: Array<{ value: string; label: string }> }
   | { name: string; label: string; kind: 'string-list'; placeholder?: string }
-  | { name: string; label: string; kind: 'array'; itemFields: BlockPropField[]; addLabel?: string }
+  // `addLabel` is REQUIRED (#3913). It was optional, and the inspector rendered
+  // a bare English `'Add'` when it was absent — an untranslatable literal that
+  // no locale table could reach. Making the contract require it is the fix that
+  // deletes the fallback instead of translating it: a new array field cannot
+  // compile without naming its add-button key.
+  | { name: string; label: string; kind: 'array'; itemFields: BlockPropField[]; addLabel: string }
   | { name: string; label: string; kind: 'json'; placeholder?: string }
   | { name: string; label: string; kind: 'color'; options?: Array<{ value: string; label: string }> }
   // Schema-driven pickers — dropdowns populated from the live metadata.
@@ -41,10 +80,12 @@ export type BlockPropField =
   | ({ name: string; label: string; kind: 'field-picker'; placeholder?: string } & ObjectSource)
   | ({ name: string; label: string; kind: 'field-list'; placeholder?: string } & ObjectSource);
 
+/** Shared alignment options. The keys name the field (`align`), so reusing this
+ *  const on a field called anything else turns the key-derivation pin red. */
 const ALIGN_OPTS = [
-  { value: 'left', label: 'Left' },
-  { value: 'center', label: 'Center' },
-  { value: 'right', label: 'Right' },
+  { value: 'left', label: 'engine.inspector.pageBlock.option.align.left' },
+  { value: 'center', label: 'engine.inspector.pageBlock.option.align.center' },
+  { value: 'right', label: 'engine.inspector.pageBlock.option.align.right' },
 ];
 
 export const BLOCK_CONFIG: Record<string, BlockPropField[]> = {
@@ -55,118 +96,118 @@ export const BLOCK_CONFIG: Record<string, BlockPropField[]> = {
   // cover the common props; anything else surfaces in the generic "Advanced"
   // section of PageBlockInspector so the panel is never out of sync with source.
   'object-grid': [
-    { name: 'objectName', label: 'Object', kind: 'object-picker' },
-    { name: 'columns', label: 'Columns', kind: 'field-list', objectFrom: 'self', objectProp: 'objectName' },
-    { name: 'pageSize', label: 'Page size', kind: 'number', placeholder: '20' },
-    { name: 'striped', label: 'Striped rows', kind: 'boolean' },
-    { name: 'bordered', label: 'Bordered', kind: 'boolean' },
+    { name: 'objectName', label: 'engine.inspector.pageBlock.field.object-grid.objectName', kind: 'object-picker' },
+    { name: 'columns', label: 'engine.inspector.pageBlock.field.object-grid.columns', kind: 'field-list', objectFrom: 'self', objectProp: 'objectName' },
+    { name: 'pageSize', label: 'engine.inspector.pageBlock.field.object-grid.pageSize', kind: 'number', placeholder: '20' },
+    { name: 'striped', label: 'engine.inspector.pageBlock.field.object-grid.striped', kind: 'boolean' },
+    { name: 'bordered', label: 'engine.inspector.pageBlock.field.object-grid.bordered', kind: 'boolean' },
   ],
   'object-form': [
-    { name: 'objectName', label: 'Object', kind: 'object-picker' },
+    { name: 'objectName', label: 'engine.inspector.pageBlock.field.object-form.objectName', kind: 'object-picker' },
     {
-      name: 'mode', label: 'Mode', kind: 'select',
+      name: 'mode', label: 'engine.inspector.pageBlock.field.object-form.mode', kind: 'select',
       options: [
-        { value: 'create', label: 'Create' },
-        { value: 'edit', label: 'Edit' },
-        { value: 'view', label: 'View' },
+        { value: 'create', label: 'engine.inspector.pageBlock.option.mode.create' },
+        { value: 'edit', label: 'engine.inspector.pageBlock.option.mode.edit' },
+        { value: 'view', label: 'engine.inspector.pageBlock.option.mode.view' },
       ],
     },
     {
-      name: 'formType', label: 'Form type', kind: 'select',
+      name: 'formType', label: 'engine.inspector.pageBlock.field.object-form.formType', kind: 'select',
       options: [
-        { value: 'simple', label: 'Simple' },
-        { value: 'tabbed', label: 'Tabbed' },
-        { value: 'wizard', label: 'Wizard' },
-        { value: 'split', label: 'Split' },
-        { value: 'drawer', label: 'Drawer' },
-        { value: 'modal', label: 'Modal' },
+        { value: 'simple', label: 'engine.inspector.pageBlock.option.formType.simple' },
+        { value: 'tabbed', label: 'engine.inspector.pageBlock.option.formType.tabbed' },
+        { value: 'wizard', label: 'engine.inspector.pageBlock.option.formType.wizard' },
+        { value: 'split', label: 'engine.inspector.pageBlock.option.formType.split' },
+        { value: 'drawer', label: 'engine.inspector.pageBlock.option.formType.drawer' },
+        { value: 'modal', label: 'engine.inspector.pageBlock.option.formType.modal' },
       ],
     },
     {
-      name: 'layout', label: 'Layout', kind: 'select',
+      name: 'layout', label: 'engine.inspector.pageBlock.field.object-form.layout', kind: 'select',
       options: [
-        { value: 'vertical', label: 'Vertical' },
-        { value: 'horizontal', label: 'Horizontal' },
-        { value: 'inline', label: 'Inline' },
-        { value: 'grid', label: 'Grid' },
+        { value: 'vertical', label: 'engine.inspector.pageBlock.option.layout.vertical' },
+        { value: 'horizontal', label: 'engine.inspector.pageBlock.option.layout.horizontal' },
+        { value: 'inline', label: 'engine.inspector.pageBlock.option.layout.inline' },
+        { value: 'grid', label: 'engine.inspector.pageBlock.option.layout.grid' },
       ],
     },
-    { name: 'columns', label: 'Columns (grid layout)', kind: 'number', placeholder: '2' },
-    { name: 'fields', label: 'Fields', kind: 'field-list', objectFrom: 'self', objectProp: 'objectName' },
-    { name: 'title', label: 'Title', kind: 'text' },
-    { name: 'description', label: 'Description', kind: 'text' },
+    { name: 'columns', label: 'engine.inspector.pageBlock.field.object-form.columns', kind: 'number', placeholder: '2' },
+    { name: 'fields', label: 'engine.inspector.pageBlock.field.object-form.fields', kind: 'field-list', objectFrom: 'self', objectProp: 'objectName' },
+    { name: 'title', label: 'engine.inspector.pageBlock.field.object-form.title', kind: 'text' },
+    { name: 'description', label: 'engine.inspector.pageBlock.field.object-form.description', kind: 'text' },
   ],
   'object-metric': [
-    { name: 'objectName', label: 'Object', kind: 'object-picker' },
-    { name: 'label', label: 'Label', kind: 'text' },
-    { name: 'description', label: 'Description', kind: 'text' },
-    { name: 'icon', label: 'Icon', kind: 'text', placeholder: 'lucide icon name' },
+    { name: 'objectName', label: 'engine.inspector.pageBlock.field.object-metric.objectName', kind: 'object-picker' },
+    { name: 'label', label: 'engine.inspector.pageBlock.field.object-metric.label', kind: 'text' },
+    { name: 'description', label: 'engine.inspector.pageBlock.field.object-metric.description', kind: 'text' },
+    { name: 'icon', label: 'engine.inspector.pageBlock.field.object-metric.icon', kind: 'text', placeholder: 'lucide icon name' },
     {
-      name: 'colorVariant', label: 'Color', kind: 'color',
+      name: 'colorVariant', label: 'engine.inspector.pageBlock.field.object-metric.colorVariant', kind: 'color',
       options: [
-        { value: 'default', label: 'Default' },
-        { value: 'blue', label: 'Blue' },
-        { value: 'teal', label: 'Teal' },
-        { value: 'orange', label: 'Orange' },
-        { value: 'purple', label: 'Purple' },
-        { value: 'success', label: 'Success' },
-        { value: 'warning', label: 'Warning' },
-        { value: 'danger', label: 'Danger' },
+        { value: 'default', label: 'engine.inspector.pageBlock.option.colorVariant.default' },
+        { value: 'blue', label: 'engine.inspector.pageBlock.option.colorVariant.blue' },
+        { value: 'teal', label: 'engine.inspector.pageBlock.option.colorVariant.teal' },
+        { value: 'orange', label: 'engine.inspector.pageBlock.option.colorVariant.orange' },
+        { value: 'purple', label: 'engine.inspector.pageBlock.option.colorVariant.purple' },
+        { value: 'success', label: 'engine.inspector.pageBlock.option.colorVariant.success' },
+        { value: 'warning', label: 'engine.inspector.pageBlock.option.colorVariant.warning' },
+        { value: 'danger', label: 'engine.inspector.pageBlock.option.colorVariant.danger' },
       ],
     },
     {
-      name: 'format', label: 'Format', kind: 'select',
+      name: 'format', label: 'engine.inspector.pageBlock.field.object-metric.format', kind: 'select',
       options: [
-        { value: 'number', label: 'Number' },
-        { value: 'currency', label: 'Currency' },
-        { value: 'percent', label: 'Percent' },
+        { value: 'number', label: 'engine.inspector.pageBlock.option.format.number' },
+        { value: 'currency', label: 'engine.inspector.pageBlock.option.format.currency' },
+        { value: 'percent', label: 'engine.inspector.pageBlock.option.format.percent' },
       ],
     },
-    { name: 'prefix', label: 'Prefix', kind: 'text' },
-    { name: 'suffix', label: 'Suffix', kind: 'text' },
+    { name: 'prefix', label: 'engine.inspector.pageBlock.field.object-metric.prefix', kind: 'text' },
+    { name: 'suffix', label: 'engine.inspector.pageBlock.field.object-metric.suffix', kind: 'text' },
     // `aggregate` ({ field, function }) and `filter` are nested/complex — they
     // render in the generic Advanced section as editable JSON.
   ],
   'object-kanban': [
-    { name: 'objectName', label: 'Object', kind: 'object-picker' },
-    { name: 'groupField', label: 'Group by field', kind: 'field-picker', objectFrom: 'self', objectProp: 'objectName' },
-    { name: 'titleField', label: 'Title field', kind: 'field-picker', objectFrom: 'self', objectProp: 'objectName' },
-    { name: 'cardFields', label: 'Card fields', kind: 'field-list', objectFrom: 'self', objectProp: 'objectName' },
+    { name: 'objectName', label: 'engine.inspector.pageBlock.field.object-kanban.objectName', kind: 'object-picker' },
+    { name: 'groupField', label: 'engine.inspector.pageBlock.field.object-kanban.groupField', kind: 'field-picker', objectFrom: 'self', objectProp: 'objectName' },
+    { name: 'titleField', label: 'engine.inspector.pageBlock.field.object-kanban.titleField', kind: 'field-picker', objectFrom: 'self', objectProp: 'objectName' },
+    { name: 'cardFields', label: 'engine.inspector.pageBlock.field.object-kanban.cardFields', kind: 'field-list', objectFrom: 'self', objectProp: 'objectName' },
   ],
 
   // ── Layout grid ───────────────────────────────────────────────────────────
   grid: [
-    { name: 'columns', label: 'Columns', kind: 'number', placeholder: '3' },
-    { name: 'gap', label: 'Gap', kind: 'number', placeholder: '4' },
+    { name: 'columns', label: 'engine.inspector.pageBlock.field.grid.columns', kind: 'number', placeholder: '3' },
+    { name: 'gap', label: 'engine.inspector.pageBlock.field.grid.gap', kind: 'number', placeholder: '4' },
   ],
 
   // ── Content elements ──────────────────────────────────────────────────────
   'element:text': [
-    { name: 'content', label: 'Content', kind: 'text', placeholder: 'Text…' },
+    { name: 'content', label: 'engine.inspector.pageBlock.field.element:text.content', kind: 'text', placeholder: 'Text…' },
     {
       name: 'variant',
-      label: 'Variant',
+      label: 'engine.inspector.pageBlock.field.element:text.variant',
       kind: 'select',
       options: [
-        { value: 'heading', label: 'Heading' },
-        { value: 'subheading', label: 'Subheading' },
-        { value: 'body', label: 'Body' },
-        { value: 'caption', label: 'Caption' },
+        { value: 'heading', label: 'engine.inspector.pageBlock.option.variant.heading' },
+        { value: 'subheading', label: 'engine.inspector.pageBlock.option.variant.subheading' },
+        { value: 'body', label: 'engine.inspector.pageBlock.option.variant.body' },
+        { value: 'caption', label: 'engine.inspector.pageBlock.option.variant.caption' },
       ],
     },
-    { name: 'align', label: 'Align', kind: 'select', options: ALIGN_OPTS },
+    { name: 'align', label: 'engine.inspector.pageBlock.field.element:text.align', kind: 'select', options: ALIGN_OPTS },
   ],
   'element:image': [
-    { name: 'src', label: 'Source URL', kind: 'text', placeholder: 'https://…' },
-    { name: 'alt', label: 'Alt text', kind: 'text' },
+    { name: 'src', label: 'engine.inspector.pageBlock.field.element:image.src', kind: 'text', placeholder: 'https://…' },
+    { name: 'alt', label: 'engine.inspector.pageBlock.field.element:image.alt', kind: 'text' },
     {
       name: 'fit',
-      label: 'Fit',
+      label: 'engine.inspector.pageBlock.field.element:image.fit',
       kind: 'select',
       options: [
-        { value: 'cover', label: 'Cover' },
-        { value: 'contain', label: 'Contain' },
-        { value: 'fill', label: 'Fill' },
+        { value: 'cover', label: 'engine.inspector.pageBlock.option.fit.cover' },
+        { value: 'contain', label: 'engine.inspector.pageBlock.option.fit.contain' },
+        { value: 'fill', label: 'engine.inspector.pageBlock.option.fit.fill' },
       ],
     },
   ],
@@ -175,78 +216,78 @@ export const BLOCK_CONFIG: Record<string, BlockPropField[]> = {
   'element:definition-list': [
     {
       name: 'items',
-      label: 'Items',
+      label: 'engine.inspector.pageBlock.field.element:definition-list.items',
       kind: 'array',
-      addLabel: 'Add item',
+      addLabel: 'engine.inspector.pageBlock.add.element:definition-list.items',
       itemFields: [
-        { name: 'label', label: 'Label', kind: 'text' },
-        { name: 'value', label: 'Value', kind: 'text' },
+        { name: 'label', label: 'engine.inspector.pageBlock.field.element:definition-list.items.label', kind: 'text' },
+        { name: 'value', label: 'engine.inspector.pageBlock.field.element:definition-list.items.value', kind: 'text' },
       ],
     },
-    { name: 'columns', label: 'Columns (1 or 2)', kind: 'number', placeholder: '1' },
-    { name: 'inline', label: 'Inline (label · value)', kind: 'boolean' },
+    { name: 'columns', label: 'engine.inspector.pageBlock.field.element:definition-list.columns', kind: 'number', placeholder: '1' },
+    { name: 'inline', label: 'engine.inspector.pageBlock.field.element:definition-list.inline', kind: 'boolean' },
   ],
   'element:repeater': [
-    { name: 'object', label: 'Object', kind: 'object-picker' },
-    { name: 'titleField', label: 'Title field', kind: 'field-picker', objectFrom: 'self', objectProp: 'object' },
-    { name: 'fields', label: 'Fields', kind: 'field-list', objectFrom: 'self', objectProp: 'object' },
-    { name: 'limit', label: 'Limit', kind: 'number', placeholder: '10' },
-    { name: 'emptyText', label: 'Empty text', kind: 'text' },
-    { name: 'divided', label: 'Dividers between rows', kind: 'boolean' },
+    { name: 'object', label: 'engine.inspector.pageBlock.field.element:repeater.object', kind: 'object-picker' },
+    { name: 'titleField', label: 'engine.inspector.pageBlock.field.element:repeater.titleField', kind: 'field-picker', objectFrom: 'self', objectProp: 'object' },
+    { name: 'fields', label: 'engine.inspector.pageBlock.field.element:repeater.fields', kind: 'field-list', objectFrom: 'self', objectProp: 'object' },
+    { name: 'limit', label: 'engine.inspector.pageBlock.field.element:repeater.limit', kind: 'number', placeholder: '10' },
+    { name: 'emptyText', label: 'engine.inspector.pageBlock.field.element:repeater.emptyText', kind: 'text' },
+    { name: 'divided', label: 'engine.inspector.pageBlock.field.element:repeater.divided', kind: 'boolean' },
   ],
   'element:number': [
-    { name: 'object', label: 'Object', kind: 'object-picker' },
-    { name: 'field', label: 'Field', kind: 'field-picker', objectFrom: 'self', objectProp: 'object' },
+    { name: 'object', label: 'engine.inspector.pageBlock.field.element:number.object', kind: 'object-picker' },
+    { name: 'field', label: 'engine.inspector.pageBlock.field.element:number.field', kind: 'field-picker', objectFrom: 'self', objectProp: 'object' },
     {
       name: 'aggregate',
-      label: 'Aggregate',
+      label: 'engine.inspector.pageBlock.field.element:number.aggregate',
       kind: 'select',
       options: [
-        { value: 'count', label: 'Count' },
-        { value: 'sum', label: 'Sum' },
-        { value: 'avg', label: 'Average' },
-        { value: 'min', label: 'Min' },
-        { value: 'max', label: 'Max' },
+        { value: 'count', label: 'engine.inspector.pageBlock.option.aggregate.count' },
+        { value: 'sum', label: 'engine.inspector.pageBlock.option.aggregate.sum' },
+        { value: 'avg', label: 'engine.inspector.pageBlock.option.aggregate.avg' },
+        { value: 'min', label: 'engine.inspector.pageBlock.option.aggregate.min' },
+        { value: 'max', label: 'engine.inspector.pageBlock.option.aggregate.max' },
       ],
     },
     {
       name: 'format',
-      label: 'Format',
+      label: 'engine.inspector.pageBlock.field.element:number.format',
       kind: 'select',
       options: [
-        { value: 'number', label: 'Number' },
-        { value: 'currency', label: 'Currency' },
-        { value: 'percent', label: 'Percent' },
+        { value: 'number', label: 'engine.inspector.pageBlock.option.format.number' },
+        { value: 'currency', label: 'engine.inspector.pageBlock.option.format.currency' },
+        { value: 'percent', label: 'engine.inspector.pageBlock.option.format.percent' },
       ],
     },
-    { name: 'prefix', label: 'Prefix', kind: 'text' },
-    { name: 'suffix', label: 'Suffix', kind: 'text' },
+    { name: 'prefix', label: 'engine.inspector.pageBlock.field.element:number.prefix', kind: 'text' },
+    { name: 'suffix', label: 'engine.inspector.pageBlock.field.element:number.suffix', kind: 'text' },
   ],
   'element:button': [
-    { name: 'label', label: 'Label', kind: 'text' },
+    { name: 'label', label: 'engine.inspector.pageBlock.field.element:button.label', kind: 'text' },
     {
       name: 'variant',
-      label: 'Variant',
+      label: 'engine.inspector.pageBlock.field.element:button.variant',
       kind: 'select',
       options: [
-        { value: 'primary', label: 'Primary' },
-        { value: 'secondary', label: 'Secondary' },
-        { value: 'danger', label: 'Danger' },
-        { value: 'ghost', label: 'Ghost' },
-        { value: 'link', label: 'Link' },
+        { value: 'primary', label: 'engine.inspector.pageBlock.option.variant.primary' },
+        { value: 'secondary', label: 'engine.inspector.pageBlock.option.variant.secondary' },
+        { value: 'danger', label: 'engine.inspector.pageBlock.option.variant.danger' },
+        { value: 'ghost', label: 'engine.inspector.pageBlock.option.variant.ghost' },
+        { value: 'link', label: 'engine.inspector.pageBlock.option.variant.link' },
       ],
     },
     {
       name: 'size',
-      label: 'Size',
+      label: 'engine.inspector.pageBlock.field.element:button.size',
       kind: 'select',
       options: [
-        { value: 'small', label: 'Small' },
-        { value: 'medium', label: 'Medium' },
-        { value: 'large', label: 'Large' },
+        { value: 'small', label: 'engine.inspector.pageBlock.option.size.small' },
+        { value: 'medium', label: 'engine.inspector.pageBlock.option.size.medium' },
+        { value: 'large', label: 'engine.inspector.pageBlock.option.size.large' },
       ],
     },
-    { name: 'icon', label: 'Icon', kind: 'text', placeholder: 'lucide icon name' },
+    { name: 'icon', label: 'engine.inspector.pageBlock.field.element:button.icon', kind: 'text', placeholder: 'lucide icon name' },
     // Without `action` a button renders inert, and the generic "Advanced"
     // section can only edit properties the block ALREADY has — so a button
     // created in Studio had no way to become interactive at all. The spec
@@ -254,7 +295,7 @@ export const BLOCK_CONFIG: Record<string, BlockPropField[]> = {
     // editor is the honest fit until the inspector can render a nested schema.
     {
       name: 'action',
-      label: 'Action',
+      label: 'engine.inspector.pageBlock.field.element:button.action',
       kind: 'json',
       placeholder: '{ "type": "url", "target": "/environments" }',
     },
@@ -262,50 +303,50 @@ export const BLOCK_CONFIG: Record<string, BlockPropField[]> = {
 
   // ── Layout containers ─────────────────────────────────────────────────────
   'page:header': [
-    { name: 'title', label: 'Title', kind: 'text' },
-    { name: 'subtitle', label: 'Subtitle', kind: 'text' },
-    { name: 'icon', label: 'Icon', kind: 'text', placeholder: 'lucide icon name' },
-    { name: 'breadcrumb', label: 'Show breadcrumb', kind: 'boolean' },
+    { name: 'title', label: 'engine.inspector.pageBlock.field.page:header.title', kind: 'text' },
+    { name: 'subtitle', label: 'engine.inspector.pageBlock.field.page:header.subtitle', kind: 'text' },
+    { name: 'icon', label: 'engine.inspector.pageBlock.field.page:header.icon', kind: 'text', placeholder: 'lucide icon name' },
+    { name: 'breadcrumb', label: 'engine.inspector.pageBlock.field.page:header.breadcrumb', kind: 'boolean' },
   ],
   'page:card': [
-    { name: 'title', label: 'Title', kind: 'text' },
-    { name: 'bordered', label: 'Bordered', kind: 'boolean' },
+    { name: 'title', label: 'engine.inspector.pageBlock.field.page:card.title', kind: 'text' },
+    { name: 'bordered', label: 'engine.inspector.pageBlock.field.page:card.bordered', kind: 'boolean' },
   ],
   'page:tabs': [
     {
       name: 'items',
-      label: 'Tabs',
+      label: 'engine.inspector.pageBlock.field.page:tabs.items',
       kind: 'array',
-      addLabel: 'Add tab',
+      addLabel: 'engine.inspector.pageBlock.add.page:tabs.items',
       itemFields: [
-        { name: 'key', label: 'Key', kind: 'text' },
-        { name: 'label', label: 'Label', kind: 'text' },
+        { name: 'key', label: 'engine.inspector.pageBlock.field.page:tabs.items.key', kind: 'text' },
+        { name: 'label', label: 'engine.inspector.pageBlock.field.page:tabs.items.label', kind: 'text' },
       ],
     },
   ],
   'page:accordion': [
-    { name: 'title', label: 'Title', kind: 'text' },
+    { name: 'title', label: 'engine.inspector.pageBlock.field.page:accordion.title', kind: 'text' },
     {
       name: 'items',
-      label: 'Sections',
+      label: 'engine.inspector.pageBlock.field.page:accordion.items',
       kind: 'array',
-      addLabel: 'Add section',
+      addLabel: 'engine.inspector.pageBlock.add.page:accordion.items',
       itemFields: [
-        { name: 'value', label: 'Key', kind: 'text' },
-        { name: 'label', label: 'Label', kind: 'text' },
+        { name: 'value', label: 'engine.inspector.pageBlock.field.page:accordion.items.value', kind: 'text' },
+        { name: 'label', label: 'engine.inspector.pageBlock.field.page:accordion.items.label', kind: 'text' },
       ],
     },
   ],
 
   // ── Record context ────────────────────────────────────────────────────────
   'record:related_list': [
-    { name: 'objectName', label: 'Object', kind: 'object-picker' },
-    { name: 'relationshipField', label: 'Relationship field', kind: 'field-picker', objectFrom: 'self', objectProp: 'objectName' },
-    { name: 'title', label: 'Title', kind: 'text' },
-    { name: 'limit', label: 'Limit', kind: 'number', placeholder: '10' },
+    { name: 'objectName', label: 'engine.inspector.pageBlock.field.record:related_list.objectName', kind: 'object-picker' },
+    { name: 'relationshipField', label: 'engine.inspector.pageBlock.field.record:related_list.relationshipField', kind: 'field-picker', objectFrom: 'self', objectProp: 'objectName' },
+    { name: 'title', label: 'engine.inspector.pageBlock.field.record:related_list.title', kind: 'text' },
+    { name: 'limit', label: 'engine.inspector.pageBlock.field.record:related_list.limit', kind: 'number', placeholder: '10' },
   ],
   'record:highlights': [
-    { name: 'fields', label: 'Fields', kind: 'field-list', objectFrom: 'page' },
+    { name: 'fields', label: 'engine.inspector.pageBlock.field.record:highlights.fields', kind: 'field-list', objectFrom: 'page' },
   ],
   'record:details': [
     {
@@ -327,61 +368,61 @@ export const BLOCK_CONFIG: Record<string, BlockPropField[]> = {
       // has no pattern/validate affordance — see the type above — and adding
       // one for a single field is outside this fix.
       name: 'sections',
-      label: 'Sections',
+      label: 'engine.inspector.pageBlock.field.record:details.sections',
       kind: 'array',
-      addLabel: 'Add section',
+      addLabel: 'engine.inspector.pageBlock.add.record:details.sections',
       itemFields: [
-        { name: 'name', label: 'Name (i18n key)', kind: 'text', placeholder: 'snake_case, e.g. contact_info' },
-        { name: 'label', label: 'Label', kind: 'text' },
-        { name: 'columns', label: 'Columns', kind: 'number', placeholder: '2' },
-        { name: 'fields', label: 'Fields', kind: 'field-list', objectFrom: 'page' },
+        { name: 'name', label: 'engine.inspector.pageBlock.field.record:details.sections.name', kind: 'text', placeholder: 'snake_case, e.g. contact_info' },
+        { name: 'label', label: 'engine.inspector.pageBlock.field.record:details.sections.label', kind: 'text' },
+        { name: 'columns', label: 'engine.inspector.pageBlock.field.record:details.sections.columns', kind: 'number', placeholder: '2' },
+        { name: 'fields', label: 'engine.inspector.pageBlock.field.record:details.sections.fields', kind: 'field-list', objectFrom: 'page' },
       ],
     },
   ],
   'record:alert': [
     {
       name: 'severity',
-      label: 'Severity',
+      label: 'engine.inspector.pageBlock.field.record:alert.severity',
       kind: 'select',
       options: [
-        { value: 'info', label: 'Info' },
-        { value: 'warning', label: 'Warning' },
-        { value: 'error', label: 'Error' },
-        { value: 'success', label: 'Success' },
+        { value: 'info', label: 'engine.inspector.pageBlock.option.severity.info' },
+        { value: 'warning', label: 'engine.inspector.pageBlock.option.severity.warning' },
+        { value: 'error', label: 'engine.inspector.pageBlock.option.severity.error' },
+        { value: 'success', label: 'engine.inspector.pageBlock.option.severity.success' },
       ],
     },
-    { name: 'title', label: 'Title', kind: 'text' },
-    { name: 'body', label: 'Body', kind: 'text' },
-    { name: 'icon', label: 'Icon', kind: 'text', placeholder: 'lucide icon name' },
-    { name: 'dismissible', label: 'Dismissible', kind: 'boolean' },
+    { name: 'title', label: 'engine.inspector.pageBlock.field.record:alert.title', kind: 'text' },
+    { name: 'body', label: 'engine.inspector.pageBlock.field.record:alert.body', kind: 'text' },
+    { name: 'icon', label: 'engine.inspector.pageBlock.field.record:alert.icon', kind: 'text', placeholder: 'lucide icon name' },
+    { name: 'dismissible', label: 'engine.inspector.pageBlock.field.record:alert.dismissible', kind: 'boolean' },
   ],
   'record:path': [
-    { name: 'statusField', label: 'Status field', kind: 'field-picker', objectFrom: 'page' },
+    { name: 'statusField', label: 'engine.inspector.pageBlock.field.record:path.statusField', kind: 'field-picker', objectFrom: 'page' },
     {
       name: 'stages',
-      label: 'Stages',
+      label: 'engine.inspector.pageBlock.field.record:path.stages',
       kind: 'array',
-      addLabel: 'Add stage',
+      addLabel: 'engine.inspector.pageBlock.add.record:path.stages',
       itemFields: [
-        { name: 'value', label: 'Value', kind: 'text' },
-        { name: 'label', label: 'Label', kind: 'text' },
+        { name: 'value', label: 'engine.inspector.pageBlock.field.record:path.stages.value', kind: 'text' },
+        { name: 'label', label: 'engine.inspector.pageBlock.field.record:path.stages.label', kind: 'text' },
       ],
     },
   ],
   'record:quick_actions': [
-    { name: 'actionNames', label: 'Action names', kind: 'string-list', placeholder: 'action name' },
+    { name: 'actionNames', label: 'engine.inspector.pageBlock.field.record:quick_actions.actionNames', kind: 'string-list', placeholder: 'action name' },
     {
       name: 'location',
-      label: 'Location',
+      label: 'engine.inspector.pageBlock.field.record:quick_actions.location',
       kind: 'select',
       options: [
-        { value: 'record_header', label: 'Record header' },
-        { value: 'record_more', label: 'Record more menu' },
-        { value: 'record_section', label: 'Record section' },
-        { value: 'record_related', label: 'Record related' },
-        { value: 'list_toolbar', label: 'List toolbar' },
-        { value: 'list_item', label: 'List item' },
-        { value: 'global_nav', label: 'Global nav' },
+        { value: 'record_header', label: 'engine.inspector.pageBlock.option.location.record_header' },
+        { value: 'record_more', label: 'engine.inspector.pageBlock.option.location.record_more' },
+        { value: 'record_section', label: 'engine.inspector.pageBlock.option.location.record_section' },
+        { value: 'record_related', label: 'engine.inspector.pageBlock.option.location.record_related' },
+        { value: 'list_toolbar', label: 'engine.inspector.pageBlock.option.location.list_toolbar' },
+        { value: 'list_item', label: 'engine.inspector.pageBlock.option.location.list_item' },
+        { value: 'global_nav', label: 'engine.inspector.pageBlock.option.location.global_nav' },
       ],
     },
   ],
@@ -391,8 +432,8 @@ export const BLOCK_CONFIG: Record<string, BlockPropField[]> = {
   // renderer — see block-types.ts PALETTE_EXCLUSIONS, #2943). A config panel
   // for an unauthorable block is how the contradiction stayed invisible.
   'ai:input': [
-    { name: 'agentName', label: 'Agent', kind: 'text', placeholder: 'agent name' },
-    { name: 'placeholder', label: 'Input placeholder', kind: 'text' },
+    { name: 'agentName', label: 'engine.inspector.pageBlock.field.ai:input.agentName', kind: 'text', placeholder: 'agent name' },
+    { name: 'placeholder', label: 'engine.inspector.pageBlock.field.ai:input.placeholder', kind: 'text' },
   ],
 };